XStream体验

XML常用的sax dom解析

XStream 的网站
xstream.codehaus.org/
看到JE上人说用XStream对XML读写不错,去看了下,在xstream的网站上有很详细的例程,这里就不多说了,都能看明白


XStream可以根据需要,写出想要的XML 的格式,
例如常见的  Hibernate 一个pojo类的配置文件 如下
<hibernate-mapping package="com"><class table="novem" name="Person"><id type="integer" column="ID" name="id">

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping package="com">
  <class name="Person" table="novem">
    <id name="id" column="ID" type="integer">
      <generator class="increment"/>
    </id>
    <property name="name" column="NAME"/>
    <property name="email" column="EMAIL"/>
  </class>
</hibernate-mapping>

<property column="NAME" name="name">
  </property>
生成代码如下:
</id></class></hibernate-mapping>

java 代码

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class createHbmXmlTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        XStream xstream = new XStream(new DomDriver());
        try{
            File write = new File("d:\\Data\\Person.hbm.xml");
            BufferedWriter brWriter= new BufferedWriter(new FileWriter(write));

            String xmlHead="\n\n";
            String xmlBody;
            // give the class or property an alias
            xstream.alias("hibernate-mapping", HibernateMapping.class);
            xstream.alias("class", Class.class);
            xstream.alias("property", Property.class);
            xstream.aliasAttribute("class","generatorClass");
            xstream.aliasAttribute("package", "tpackage");
            xstream.aliasField("class", HibernateMapping.class, "tclass");
            // hiden properties
            xstream.addImplicitCollection(Class.class,"properties");
            xstream.addImplicitCollection(Generator.class, "generatorClass");

            List proList=new ArrayList ();
            Property pro1=new Property();
            pro1.setName("name");
            pro1.setColumn("NAME");
            Property pro2=new Property();
            pro2.setName("email");
            pro2.setColumn("EMAIL");
            proList.add(pro1);
            proList.add(pro2);

            Generator gen = new Generator("increment");
            ID id=new ID("id","ID","integer",gen);

            Class hClass=new Class("Person","novem");
            hClass.setId(id);
            hClass.setProperties(proList);
            //set Package name add  class
            HibernateMapping hMapping= new HibernateMapping("com",hClass);

            //take as Attribute
            xstream.useAttributeFor(ID.class,"name");
            xstream.useAttributeFor(ID.class, "column");
            xstream.useAttributeFor(ID.class, "type");
            xstream.useAttributeFor(Class.class, "name");
            xstream.useAttributeFor(Class.class, "table");
            xstream.useAttributeFor(Property.class, "name");
            xstream.useAttributeFor(Property.class, "column");
            xstream.useAttributeFor(Generator.class, "generatorClass");
            xstream.useAttributeFor(HibernateMapping.class, "tpackage");
            xstream.registerConverter(new PropertyConverter());

            xmlBody=xstream.toXML(hMapping);
            System.out.println(xmlHead+xmlBody);

            brWriter.write(xmlHead+xmlBody);
            brWriter.close();
        }catch(FileNotFoundException e){
            System.out.println(e);
        }catch(IOException e){
            e.printStackTrace();
        }
    }

}

<hibernate-mapping package="com"><class name="Person" table="novem"><id name="id" column="ID" type="integer"><generator class="increment"></generator> <property name="name" column="NAME"></property> <property> <property> </property> </property> </id></class></hibernate-mapping>